EP0265133A3 - Gemengtes magnetisches Pulver, Verfahren zu seiner Herstellung und Aufzeichnungsträger, der dieses Pulver enthält - Google Patents

Gemengtes magnetisches Pulver, Verfahren zu seiner Herstellung und Aufzeichnungsträger, der dieses Pulver enthält Download PDF

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Publication number
EP0265133A3
EP0265133A3 EP87308992A EP87308992A EP0265133A3 EP 0265133 A3 EP0265133 A3 EP 0265133A3 EP 87308992 A EP87308992 A EP 87308992A EP 87308992 A EP87308992 A EP 87308992A EP 0265133 A3 EP0265133 A3 EP 0265133A3
Authority
EP
European Patent Office
Prior art keywords
same
magnetic powder
recording medium
composite magnetic
producing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP87308992A
Other languages
English (en)
French (fr)
Other versions
EP0265133A2 (de
Inventor
Nobuyuki Aoki
Masaki Aoki
Hideo Torii
Keiichi Ochiai
Eiji Fujii
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP61242425A external-priority patent/JP2656028B2/ja
Priority claimed from JP61286328A external-priority patent/JP2574265B2/ja
Priority claimed from JP62111029A external-priority patent/JPS63275103A/ja
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Publication of EP0265133A2 publication Critical patent/EP0265133A2/de
Publication of EP0265133A3 publication Critical patent/EP0265133A3/de
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/62—Record carriers characterised by the selection of the material
    • G11B5/68—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
    • G11B5/70—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer
    • G11B5/706—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material
    • G11B5/70626—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material containing non-metallic substances
    • G11B5/70642—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material containing non-metallic substances iron oxides
    • G11B5/70678—Ferrites
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/90—Magnetic feature
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
    • Y10T428/256—Heavy metal or aluminum or compound thereof
    • Y10T428/257—Iron oxide or aluminum oxide

Landscapes

  • Hard Magnetic Materials (AREA)
  • Magnetic Record Carriers (AREA)
  • Compounds Of Iron (AREA)
  • Paints Or Removers (AREA)
EP87308992A 1986-10-13 1987-10-12 Gemengtes magnetisches Pulver, Verfahren zu seiner Herstellung und Aufzeichnungsträger, der dieses Pulver enthält Withdrawn EP0265133A3 (de)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP242425/86 1986-10-13
JP61242425A JP2656028B2 (ja) 1986-10-13 1986-10-13 複合型フエライト粉体の製造方法
JP61286328A JP2574265B2 (ja) 1986-12-01 1986-12-01 複合型磁性粉体およびその製造方法
JP286328/86 1986-12-01
JP62111029A JPS63275103A (ja) 1987-05-07 1987-05-07 磁気記録媒体
JP111029/87 1987-05-07

Publications (2)

Publication Number Publication Date
EP0265133A2 EP0265133A2 (de) 1988-04-27
EP0265133A3 true EP0265133A3 (de) 1990-01-10

Family

ID=27311869

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87308992A Withdrawn EP0265133A3 (de) 1986-10-13 1987-10-12 Gemengtes magnetisches Pulver, Verfahren zu seiner Herstellung und Aufzeichnungsträger, der dieses Pulver enthält

Country Status (2)

Country Link
US (1) US4957812A (de)
EP (1) EP0265133A3 (de)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4855205A (en) * 1988-08-05 1989-08-08 Eastman Kodak Company Interdispersed two-phase ferrite composite and carrier therefrom
EP0416324A3 (en) * 1989-09-05 1991-09-25 Willi Studer Ag Fabrik Fuer Elektronische Apparate Magnetic recording medium
US5106714A (en) * 1990-08-01 1992-04-21 Eastman Kodak Company Interdispersed two-phase ferrite composite and electrographic magnetic carrier particles therefrom
JPH05144615A (ja) * 1991-04-18 1993-06-11 Toshiba Corp 磁気記録用磁性粉およびそれを用いた磁気記録媒体
US5494749A (en) * 1991-04-18 1996-02-27 Kabushiki Kaisha Toshiba Magnetic powder for magnetic recording and magnetic recording medium containing the same
US5698336A (en) * 1991-06-28 1997-12-16 Kabushiki Kaisha Toshiba Magnetic recording medium
US5190841A (en) * 1991-12-19 1993-03-02 Eastman Kodak Company Two-phase ferroelectric-ferromagnetic composite and carrier therefrom
US5190842A (en) * 1991-12-19 1993-03-02 Eastman Kodak Company Two phase ferroelectric-ferromagnetic composite carrier
US5268249A (en) * 1992-10-29 1993-12-07 Eastman Kodak Company Magnetic carrier particles
US5306592A (en) * 1992-10-29 1994-04-26 Eastman Kodak Company Method of preparing electrographic magnetic carrier particles
US7091412B2 (en) 2002-03-04 2006-08-15 Nanoset, Llc Magnetically shielded assembly
US7162302B2 (en) 2002-03-04 2007-01-09 Nanoset Llc Magnetically shielded assembly
US8524190B2 (en) * 2008-05-30 2013-09-03 Skyworks Solutions, Inc. Enhanced hexagonal ferrite material and methods of preparation and use thereof
KR101515680B1 (ko) * 2008-10-20 2015-04-27 스카이워크스 솔루션즈, 인코포레이티드 자성-유전 조립체 및 그 제조방법
JP6722684B2 (ja) * 2015-01-30 2020-07-15 ロジャーズ コーポレーション 極超短波用ＭＯドープＣｏ２Ｚ型フェライト複合材料
CN108475568B (zh) * 2016-01-18 2022-05-31 罗杰斯公司 包括六角铁氧体纤维的磁介电材料、制备方法及其用途
US11679991B2 (en) 2019-07-30 2023-06-20 Rogers Corporation Multiphase ferrites and composites comprising the same
GB2606909A (en) 2020-02-21 2022-11-23 Rogers Corp Z-type hexaferrite having a nanocrystalline structure

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0290263A1 (de) * 1987-05-07 1988-11-09 Matsushita Electric Industrial Co., Ltd. Scheibenförmiges Magnetpulver und dessen Herstellungsverfahren sowie ein Aufnahmemedium aus diesem Magnetpulver

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4584242A (en) * 1984-05-31 1986-04-22 Toda Kogyo Corp. Plate-like barium ferrite particles for magnetic recording and process for producing the same
JPS6116016A (ja) * 1984-07-02 1986-01-24 Tdk Corp 磁気記録媒体
US4600521A (en) * 1984-10-09 1986-07-15 Nippon Zeon Co., Ltd. Electron-beam reactive magnetic coating composition for magnetic recording media
JPS62103845A (ja) * 1985-07-12 1987-05-14 Fuji Photo Film Co Ltd 磁気記録媒体
US4707410A (en) * 1985-09-11 1987-11-17 Nippon Zeon Co., Ltd. Magnetic recording media
JPS62124564A (ja) * 1985-11-26 1987-06-05 Hitachi Metals Ltd 静電荷像現像用キヤリア
JPH0727808B2 (ja) * 1985-12-12 1995-03-29 戸田工業株式会社 磁気記録用板状Ｂａフエライト微粒子粉末及びその製造法
JPH0727810B2 (ja) * 1986-06-17 1995-03-29 松下電器産業株式会社 磁性粉体の製造方法

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0290263A1 (de) * 1987-05-07 1988-11-09 Matsushita Electric Industrial Co., Ltd. Scheibenförmiges Magnetpulver und dessen Herstellungsverfahren sowie ein Aufnahmemedium aus diesem Magnetpulver

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, vol. 11, no. 342 (P-635), 10th November 1987, page 26 P 635; & JP-A-62 124 564 (HITACHI METALS LTD) 05-06-1987 *
PATENT ABSTRACTS OF JAPAN, vol. 11, no. 366 (P-641), 11th November 1987, page 120 P 641; & JP-A-62 139 121 (TODA KOGYO CORP.) 22-06-1987 *
PATENT ABSTRACTS OF JAPAN, vol. 12, no. 193 (E-617), 4th June 1988, page 147 E 617; & JP-A-62 296 501 (MATSUSHITA ELECTRIC IND. CO. LTD) 23-12-1987 *

Also Published As

Publication number Publication date
US4957812A (en) 1990-09-18
EP0265133A2 (de) 1988-04-27

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Inventor name: AOKI, NOBUYUKI

Inventor name: TORII, HIDEO

Inventor name: FUJII, EIJI

Inventor name: AOKI, MASAKI

Inventor name: OCHIAI, KEIICHI